{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+Quadrivalent+influenza+vaccine&page=3",
    "query": {
      "intervention": "Seasonal Quadrivalent influenza vaccine",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 61,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+Quadrivalent+influenza+vaccine&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+Quadrivalent+influenza+vaccine&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-11T17:24:39.869Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT03945825",
      "title": "Flublok or Fluzone With Advax-CpG55.2 or AF03",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Influenza",
        "Influenza Immunisation"
      ],
      "interventions": [
        {
          "name": "AF03",
          "type": "DRUG"
        },
        {
          "name": "Delta Inulin-CpG55.2",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Influenza Virus Quadrivalent Inactivated Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Recombinant Seasonal Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 241,
      "start_date": "2019-06-10",
      "completion_date": "2020-09-18",
      "has_results": true,
      "last_update_posted_date": "2025-10-14",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 8,
      "location_summary": "Atlanta, Georgia • Iowa City, Iowa • Baltimore, Maryland + 5 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03945825"
    },
    {
      "nct_id": "NCT05945485",
      "title": "A Study to Evaluate the Safety and Immunogenicity of Two Doses of DCVC H1 HA mRNA-LNP in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "DCVC H1 HA mRNA vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Recombinant Seasonal Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Sodium Chloride, 0.9%",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 50,
      "start_date": "2023-10-16",
      "completion_date": "2026-05-21",
      "has_results": false,
      "last_update_posted_date": "2026-06-22",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 1,
      "location_summary": "Iowa City, Iowa",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05945485"
    },
    {
      "nct_id": "NCT03884296",
      "title": "Response to Live Attenuated Influenza Vaccine in Tonsillar Tissues and Blood",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "FluMist",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "2 Years to 49 Years"
      },
      "enrollment_count": 0,
      "start_date": "2019-04-15",
      "completion_date": "2023-11-17",
      "has_results": false,
      "last_update_posted_date": "2023-11-21",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03884296"
    },
    {
      "nct_id": "NCT05330975",
      "title": "A Study of mRNA-1345 Vaccine Targeting Respiratory Syncytial Virus (RSV) in Adults ≥50 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Respiratory Syncytial Virus"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1345",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Afluria® Quadrivalent",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1273.214",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 3317,
      "start_date": "2022-04-01",
      "completion_date": "2024-11-08",
      "has_results": true,
      "last_update_posted_date": "2025-12-30",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 62,
      "location_summary": "Birmingham, Alabama • Tucson, Arizona • Garden Grove, California + 51 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Garden Grove",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05330975"
    },
    {
      "nct_id": "NCT03650114",
      "title": "Long-term Safety, Tolerability and Effectiveness Study of Ofatumumab in Patients With Relapsing MS",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Relapsing Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Ofatumumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Tetanus toxoid (TT) containing vaccine (Td, Tdap)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "13-valent pneumococcal conjugate vaccine (13-PCV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "23-valent pneumococcal polysaccharide vaccine (23-PPV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Seasonal Quadrivalent influenza vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Keyhole limpet hemocyanin (KLH) neo-antigen",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 1882,
      "start_date": "2018-12-28",
      "completion_date": "2028-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-27",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 86,
      "location_summary": "Birmingham, Alabama • Cullman, Alabama • Phoenix, Arizona + 74 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Cullman",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03650114"
    },
    {
      "nct_id": "NCT06602024",
      "title": "A Study of mRNA-1010 Compared With a Licensed Influenza Vaccine in Adults ≥50 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Seasonal Influenza"
      ],
      "interventions": [
        {
          "name": "mRNA-1010",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluarix®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Influsplit® Tetra",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluarix Tetra",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Alpharix® Tetra",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 40805,
      "start_date": "2024-09-16",
      "completion_date": "2025-08-21",
      "has_results": true,
      "last_update_posted_date": "2026-09-16",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 188,
      "location_summary": "Anniston, Alabama • Athens, Alabama • Birmingham, Alabama + 150 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Athens",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Cullman",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06602024"
    },
    {
      "nct_id": "NCT03658629",
      "title": "Phase 2 Dose and Formulation Confirmation of Quad-NIV in Older Adults",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "NanoFlu (Quad-NIV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Matrix-M Adjuvant",
          "type": "OTHER"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Fluzone HD",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flublok Quadrivalent",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 1375,
      "start_date": "2018-09-24",
      "completion_date": "2019-04-26",
      "has_results": true,
      "last_update_posted_date": "2022-11-04",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 14,
      "location_summary": "Hollywood, Florida • Savannah, Georgia • Stockbridge, Georgia + 11 more",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Savannah",
          "state": "Georgia"
        },
        {
          "city": "Stockbridge",
          "state": "Georgia"
        },
        {
          "city": "Rockville",
          "state": "Maryland"
        },
        {
          "city": "Norfolk",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03658629"
    },
    {
      "nct_id": "NCT04120194",
      "title": "Phase 3 Pivotal Trial of NanoFlu™ in Older Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "NanoFlu",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone Quadrivalent",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 2654,
      "start_date": "2019-10-14",
      "completion_date": "2020-12-13",
      "has_results": true,
      "last_update_posted_date": "2023-05-06",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 19,
      "location_summary": "Hollywood, Florida • Savannah, Georgia • Stockbridge, Georgia + 16 more",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Savannah",
          "state": "Georgia"
        },
        {
          "city": "Stockbridge",
          "state": "Georgia"
        },
        {
          "city": "Meridian",
          "state": "Idaho"
        },
        {
          "city": "Nampa",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04120194"
    },
    {
      "nct_id": "NCT02307851",
      "title": "Quadrivalent Influenza VLP Vaccine Dose Ranging Study in Young Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Quadrivalent VLP Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Comparator TIV",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 400,
      "start_date": "2014-11",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2016-09-23",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 5,
      "location_summary": "Anaheim, California • Miami, Florida • Lenexa, Kansas + 2 more",
      "locations": [
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Lenexa",
          "state": "Kansas"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02307851"
    },
    {
      "nct_id": "NCT03615482",
      "title": "A Study to Evaluate the Safety, Tolerability, and Immunogenicity of V114 When Administered Concomitantly With Influenza Vaccine in Healthy Adults 50 Years of Age or Older (V114-021/PNEU-FLU)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pneumococcal Infections"
      ],
      "interventions": [
        {
          "name": "V114",
          "type": "BIOLOGICAL"
        },
        {
          "name": "QIV",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Matching Placebo for V114",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Merck Sharp & Dohme LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 1200,
      "start_date": "2018-09-14",
      "completion_date": "2019-06-24",
      "has_results": true,
      "last_update_posted_date": "2024-05-22",
      "last_synced_at": "2026-10-11T17:24:39.869Z",
      "location_count": 45,
      "location_summary": "Birmingham, Alabama • Chandler, Arizona • Mesa, Arizona + 39 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03615482"
    }
  ]
}